The idea of investing in weak currencies just because they are cheap is a bad idea, most of them will never recover, investing in them is like you expect your luck.
It's not so bad as long as you can determine which crypto that worth to invest, In this case, your analysis will play as the main thing to determine how your investment should be.
If that was a major coin that has a lot of potential that goes to the cheap price and is that something wrong? The fact that gives us more chance to invest.